The describes the number of legitimate users who are denied access because of a failure in the biometric device. This failure is known as a Type I error.

FALSE REJECTION RATE

Explanation:

In the case of a verification system, two error rates are evaluated which vary in opposite directions. These error rates are: false rejection rate and false acceptance rate.

False rejection rate (FRR) is the rejection of a legitimate user called the client. The false rejection rate is the measure of the likelihood that the biometric security system will incorrectly reject an access attempt by an authorized user.

A system's FRR typically is stated as the ratio of the number of false rejections divided by the number of identification attempts.

Therefore, The FALSE REJECTION RATE describes the number of legitimate users who are denied access because of a failure in the biometric device.

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